After pushing for making OOXML a “standard format” (as in ISO), Microsoft is not implementing the standard spec after all (and won’t until some future version).

Microsoft is going to support ODF (competing, open format).

Of course, they want people to use a non-standard OOXML (the one currently in Office 2007 apparently), so they aren’t really in a hurry to support ISO’s OOXML, and their ODF support will probably not be perfect, so they’re just doing the usual stuff, trying to get people to use some format that they are in a better position to support. Oh well.